Draw-plunger pump.



W. E. DO-WNING.

DRAW PLUNGER PUMP- APPLICATION FILED MAR-13, I916.

Patented June 13, 1916.

WILLIAM EVAN DOWNING, OF WARRNAMBOOL, VICTORIA, AUSTRALIA.

DRAW-PLUNGER PUMP.

Specification of Letters Patent.

Patented June 13, 1916.

Application filed March 13, 1916. Serial No. 83,937.

To all whom it may concern:

Be it known that I, WLLLIAM EVAN DOWNING, subject of the King of Great Britain, residing at Henna street, Warrnambool, in the State of Victoria, Australia, have invented certain new and useful Improvements in Draw-Plunger Pumps, of Which the following is a specification.

This invention relates to draw plunger pumps of the type in which the lower valve can be withdrawn through the uptake p1pe by means of the working plunger.

The invention also consists of constructional improvements whereby a cage carrying such lower valve may be seated and unseated in an expeditious manner, and where: by the plunger may be adjusted to insure a good working fit in the pump barrel without necessitating the removal of the plunger therefrom.

The improvements are thus of particular advantage in repair work as much time usually expended thereon may be saved.

The invention is applicable to pumps of normal length provided with various types of lower valves in the barrel such as drop valves, ball valves, shuttle valves, conical valves, leather flap valves or spool valves. It is moreover designed to obviate the difficulties arising through damaged threads in the use of draw plunger pumps of known t e.

The invention is illustrated by the accompanying drawings whereof:

Figure 1 is a vertical section showing the working plunger in its lowest position. Fig. 2 is a plan of a detail of Fig. 1. Fig. 3

is a fragmentary vertical sectional view illustrating a slight modification of the lower end of the plunger as shown in Fig. 1, said figure showing a plunger provided with a suitable packing adapted for working in water containing sand. Figs. 1, '5 and 6 are enlarged transverse sectional detail Views illustrating various means for locking the cage of the plunger against rotation.

Referring to Figs. 1 and 2 of the drawings it will be seen that a comparatively long rod 1 is connected at its end to the cage of the lower valve 2 said rod being in the form of a double headed bolt 2'. e. the rod is provided at its respective ends with enlarged heads 3 and 3. The bottom head 3 is engaged and is substantially enveloped by a flanged collar 4 on the cage of said lower valve 2. The working plunger or bucket in which said rod is located comprises two separated members A and B, the lower one consisting of the packings 6, cage 7, and a guide 8 for the rod; and, the upper member consisting of the valve 9. The members A and B are connected by a compa'atively long tube 10 surrounding the r0 '1. 1

The packings 6 encircle an adjustable sleeve 11 connected to the tube 10 and are secured between a shoulder '12 on said sleeve and the upper end 13 of the cage 7 into which said sleeve is screwed. When water free from sand is being pumped leather packings as illustrated'in Fig. 1 are employed and they are separated by loose and detachable rings 14. If, however, the water contains sand, packings of fibrous material,

- such as rope 15, as shown in Fig. 3, are

substituted for the leather cups and rings. Owing to the friction caused by the sand the fibrous packings wear away quickly and require tightening up to insure a good fit of the plunger and so render it effective. For this purpose the cage 7 may be provided with a downward projection 16 which, when the plunger is in its lowermost position, engages a lateral lug 17 on the collar 4 and locks the cage against rotation with the'tube 10. Thus, by rotating the latter through the pump rod 18 the sleeve 11 is screwed down relative to the cage 7 and the fibrous packing 15 is compressed between the shoulders 12 and 13, without necessitating the removal of the pump from the uptake pipe 27.

It will be evident that the cage 7 may be locked against rotation for this purpose in various ways, and not necessarily when the pump is stationary, as in the above instance, but while in motion. As an example the rod 1 may be square in cross section and likewise the passage of the guide 8, while the head 3 is fastened to the collar 4 by a pin 19 or made square to fit a corresponding seating in said collar. Alternately the guide may have a feather 20 adapted to engage a featherway 21 in a round rod 1 as in Fig. A or said rod may have a feather 22 engaging a longitudinal groove 23 in the rod,- as shown by dotted lines Fig.- 4. The rod moreover may be hollow and consist of a tube formed ed to be engaged by a feather on the guide or a solid rod may have a longitudinal slot 25 in engagement with a transverse pin 26 extending across the guide passage as in Fig. 6. In allof these alternatives the rod 1 is fixed so as to be rendered non-rotatable. It will be understood that these forms of adjustments apply to plungers of a number of different types of draw plunger pumps as well as to the type illustrated.

The plunger according to this invention works freely up and down over the rod 1 and only engages the head 3 within the tube 10 when it is desired to the lower valve 2 out of its seating 28 in the barrel 5.

The length of the tube 10 and the distance separating the two members'A and B of the working plunger and, also, the length of the double bolt headed rod 1 are such that the lower member of the working plunger may come right down on to the cage of the lower valve 2 to hammer it into its seating 27 as illustrated without the upper head 3 of the rod 1 contacting with the upper valve 9 of the plunger. When it is desired to draw the cage containing the lower valve 2 out the plunger is raised higher than its working stroke whereby the lower member of the plunger will be well above the working barrel 10 and loose in the uptake pipe 27 before the guide 8 engages the top head 3 on the rod 1 as in dotted lines Fig. 1. When the head 3 of the rod is engaged, the cage of the valve 2 is jarred out of its seat and drawn 'up the uptake pipe. The distance that the plunger travels above the working barrel 10 is so arranged as to give a sufficient stroke for effective jarring of the lower valve in case the same is very tight in its seat.

I claim 1. In a pump, a pump barrel, a plunger working in said barrel and including a tubular member having a valve member at its upper end and a packing member at its lower end, said tube being capable of rotation, a rod disposed within the tube and having an enlarged head at its upper end, a guide member depending from the tube and having the lower end of the rod extended therethrough, a valve seated in the barrel and secured to the lower end of the rod, said packing member consisting of asleeve member carried by the tube and having an adjustable connection with said guide, a lug projecting from said last-mentioned valve member, and a projection extending from said guide and adapted to engage with said lug, whereby said guide is prevented from rotating when the tube is rotated, thereby effecting the adjustment of said packing member.

2. In a pump, a pump barrel, a hollow plunger working insaid barrel being capable of rotation, an adjustable packing container comprising a sleeve formed. with an outwardly projecting annular flange at one end thereof and with an internal rabbet at the extremity of said end, one end of said plunger being threaded in said rabbet, a cage externally and adjustably threaded on the opposite end of said sleeve, packing encircling said sleeve between said flange and the top of said cage, a valve seated in the barrel and having a slidable connection with said cage, a lug projecting from said valve, and a projection extending from said cage and adapted to engage with said lug, whereby said cage is prevented from rotating when the valve is rotated, thereby effecting the adjustment of said packing container.

In testimony whereof I have hereunto set my hand.

WVILLIAM EVAN DOWNING.

Games of this patent may be obtained for five cents each, by addressing the "commissioner of Eatents,

' Washington, D. C. 

